<template>
  <section class="loginContainer">
    <div class="loginInner">
      <div class="login_header">
        <h2 class="login_logo">丽院外卖</h2>
        <div class="login_header_title">
          <a href="javascript:;" :class="{on: loginWay}" @click="loginWay=true">短信登录</a>
          <a href="javascript:;" :class="{on: !loginWay}" @click="loginWay=false">密码登录</a>
        </div>
      </div>
      <div class="login_content">
        <form @submit.prevent="login">
          <div :class="{on: loginWay}">
            <section class="login_message">
              <input type="tel" maxlength="11" placeholder="手机号" v-model="phone">
              <button :disabled="!rightPhone" class="get_verification" :class="{right_phone:rightPhone}"
              @click.prevent="getCode">{{computeTime>0 ? `已发送(${computeTime}s)` : '获取验证码'}}</button>
            </section>
            <section class="login_verification">
              <input type="tel" maxlength="8" placeholder="验证码" v-model="code">
            </section>
            <section class="login_hint">
              温馨提示：未注册硅谷外卖帐号的手机号，登录时将自动注册，且代表已同意
              <a href="javascript:;">《用户服务协议》</a>
            </section>
          </div>
          <div :class="{on: !loginWay}">
            <section>
              <section class="login_message">
                <input type="tel" maxlength="11" placeholder="手机/邮箱/用户名" v-model="name">
              </section>
              <section class="login_verification">
                <input type="text" maxlength="8" placeholder="密码" v-if="showPwd" v-model="pwd">
                <input type="password" maxlength="8" placeholder="密码" v-else v-model="pwd">
                <div class="switch_button off" :class="showPwd ? 'on': 'off'" @click="showPwd=!showPwd">
                  <div class="switch_circle" :class="{right: showPwd}"></div>
                  <span class="switch_text">{{showPwd ? 'abc' : '...'}}</span>
                </div>
              </section>
              <section class="login_message">
                <input type="text" maxlength="11" placeholder="验证码" v-model="captcha">
                <img class="get_verification" src="http://localhost:4000/captcha" alt="captcha" @click="getCaptcha" ref="captcha">
              </section>
            </section>
          </div>
          <button class="login_submit">登录</button>
        </form>
        <a href="javascript:;" class="about_us">关于我们</a>
      </div>
      <a href="javascript:" class="go_back" @click="$router.back()">
        <i class="iconfont icon-jiantou2"></i>
      </a>
    </div>
    <AlertTip :alertText="alertText" v-show="alertShow" @closeTip="closeTip"/>
  </section>
</template>

<script>
  import AlertTip from '../../components/AlertTip/AlertTip.vue'
  import {reqSendCode, reqSmsLogin, reqPwdLogin} from '../../api' //把登录需要的东西都导入进来
    export default {
        data(){
          return {
            loginWay:false,//true代表了短信登录，false代表了密码登录
            computeTime:0,//计时的时间
            showPwd: false,//是否显示密码
            phone: '',//手机号
            code:'',//短信验证码
            name: '',//用户名
            pwd: '',//密码
            captcha: '', //图形验证码
            alertText: '', //提示文本
            alertShow:false, //是否显示警告框
          }
        },
        computed:{
          rightPhone(){
            return /^1\d{10}$/.test(this.phone)
          }
        },
      methods:{
          //异步获取短信验证码
          async getCode(){
            //如果当前没有计时
            if(!this.computeTime){
              //启动倒计时
              this.computeTime = 30
              this.intervalId = setInterval(() => {
                this.computeTime--
                if(this.computeTime<=0){
                  //停止计时
                  clearInterval(this.intervalId)
                }
              },1000)

              //发送ajax请求(向指定手机号发送验证码短信)
              const result = await reqSendCode(this.phone)
              if(result.code===1){
                //显示提示
                this.showAlert(result.msg)
                //停止倒计时
                if(this.computeTime){
                  this.computeTime = 0
                  clearInterval(this.intervalId)
                  this.intervalId = undefined
                }
              }
            }


          },
          showAlert(alertText){
            this.alertShow = true
            this.alertText = alertText
          },

          async login(){
            let result
            //前台表单验证
            if(this.loginWay){//短信登录
               const {rightPhone,phone, code} = this
              if(!this.rightPhone){
                //手机号不正确
                this.showAlert('手机号不正确')
                return //不能往下执行了返回
              }else if(!/^\d{6}$/.test(code)){
                 //验证必须是6位数字
                this.showAlert('验证必须是6位数字')
                return
              }
              //发送ajax请求短信登录
               result = await reqSmsLogin(phone, code)


            }else{//密码登录
              const {name,pwd,captcha} = this
              if(!this.name){
                //用户名必须指定
                this.showAlert('用户名必须指定')
                return
              }else if(!this.pwd){
                //密码必须指定
                this.showAlert('密码必须指定')
                return
              }else if(!this.captcha){
                //验证码必须指定
                this.showAlert('验证码必须指定')
                return
              }
              //发送ajax请求密码登录
               result = await reqPwdLogin({name, pwd, captcha})

            }

            //停止倒计时
            if(this.computeTime){
              this.computeTime = 0
              clearInterval(this.intervalId)
              this.intervalId = undefined
            }

            //根据结果数据处理
            if(result.code===0){
              const user = result.data
                //将user保存到vuex的store
              this.$store.dispatch('recordUser',user)
                //去个人中心界面
               this.$router.replace('/profile')//不需要再返回这个界面所以使用replace,需要返回的时候使用push
            }else{
              //显示新的图片验证码
              this.getCaptcha()
              //显示警告提示
              const msg = result.msg
              this.showAlert(msg)
            }

          },
          //关闭警告框
          closeTip(){
            this.alertShow = false
            this.alertText = ''
          },
          //获取一个新的图片验证码
          getCaptcha(){
            //每次指定的src值要不一样
             this.$refs.captcha.src = "http://localhost:4000/captcha?time="+Date.now()
          }
      },
      components: {
          AlertTip
      }
    }
</script>

<style lang="stylus" rel="stylesheet/stylus">
  @import "../../common/stylus/mixins.styl"
  .loginContainer
    width 100%
    height 100%
    background #fff
    .loginInner
      padding-top 60px
      width 80%
      margin 0 auto
      .login_header
        .login_logo
          font-size 40px
          font-weight bold
          color #02a774
          text-align center
        .login_header_title
          padding-top 40px
          text-align center
          >a
            color #333
            font-size 14px
            padding-bottom 4px
            &:first-child
              margin-right 40px
            &.on
              color #02a774
              font-weight 700
              border-bottom 2px solid #02a774
      .login_content
        >form
          >div
            display none
            &.on
              display block
            input
              width 100%
              height 100%
              padding-left 10px
              box-sizing border-box
              border 1px solid #ddd
              border-radius 4px
              outline 0
              font 400 14px Arial
              &:focus
                border 1px solid #02a774
            .login_message
              position relative
              margin-top 16px
              height 48px
              font-size 14px
              background #fff
              .get_verification
                position absolute
                top 50%
                right 10px
                transform translateY(-50%)
                border 0
                color #ccc
                font-size 14px
                background transparent
                &.right_phone
                 color black      //把正确的电话号码再加一个属性变黑
            .login_verification
              position relative
              margin-top 16px
              height 48px
              font-size 14px
              background #fff
              .switch_button
                font-size 12px
                border 1px solid #ddd
                border-radius 8px
                transition background-color .3s,border-color .3s
                padding 0 6px
                width 30px
                height 16px
                line-height 16px
                color #fff
                position absolute
                top 50%
                right 10px
                transform translateY(-50%)
                &.off
                  background #fff
                  .switch_text
                    float right
                    color #ddd
                &.on
                  background #02a774
                >.switch_circle
                  //transform translateX(27px)
                  position absolute
                  top -1px
                  left -1px
                  width 16px
                  height 16px
                  border 1px solid #ddd
                  border-radius 50%
                  background #fff
                  box-shadow 0 2px 4px 0 rgba(0,0,0,.1)
                  transition transform .3s
                  &.right
                     transform translateX(16px)
            .login_hint
              margin-top 12px
              color #999
              font-size 14px
              line-height 20px
              >a
                color #02a774
          .login_submit
            display block
            width 100%
            height 42px
            margin-top 30px
            border-radius 4px
            background #4cd96f
            color #fff
            text-align center
            font-size 16px
            line-height 42px
            border 0
        .about_us
          display block
          font-size 12px
          margin-top 20px
          text-align center
          color #999
      .go_back
        position absolute
        top 5px
        left 5px
        width 30px
        height 30px
        >.iconfont
          font-size 20px
          color #999
</style>
